Metal ring for temporary binding.



No. 692,584. Patented Feb. 4, I902.

H. T. ADAMS 8|. 0. KELLNEB. METAL RING FUR TEMPORARY BINDING.

(Application filed May 81, 1901.)

(No Model.)

I72 veniars THE Nanms PETERS co. Pnoraurho. WAQNINGYON. o, c.

UNITED STATES I P TENT OFFICE.

HENRY T. ADAMS AND OTTO KELLNER, OF CHICAGO, ILLINOIS.

METAL RING FOR TEMPORARY BINDING.

SPECIFICATION formingpart of Letters Patent No. 692,584, dated February4, 1902.

Application filed May 31,1901.

To ctZZ whom it may concern.-

I Be it known that we, HENRY T. ADAMS and OTTO KELLNER, citizens of theUnited States, and residents of Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in MetalRings for Temporary Binders, &c., of which the following is a full,clear, and exact description.

This invention has. for its object to provide an improved constructionof metal ring more especially designed for use in connection with thatclass of temporary binders in which a cover having a flexible back withmetal eyelets therein is employed, such eyelets serving to receive themetal rings that retain the loose sheets of paper or the like within thecovers of the binder.

The invention consists in the. novel features of constructionhereinafter described, illustrated in the accompanying drawings, andmore particularly defined in the claims at the end of thisspecification.

Figure 1 is a perspective view of a ring embodying ourinvention,the ringbeing shown in closed position. Fig. 2 is a perspective view showing thering partially open.

A and A denote the semicircular sections of the ring, preferablyformedof spring-wire. One end of each section is flattened in thedirection of the plane of the ring. The flattened ends are overlappedand the sections laterally pivoted together by a rivet B, extendingthrough the flattened portions. The ends of rivet Bare sufficientlyupset .to securely retain the sections of the ring in firm pivotalrelation. The free ends of the sections are each provided upon one sidewith interlocking or notched faces located in planes intersecting theaxis of the ringi. e., extending in the direction of the radius-each ofwhich faces preferably comprises a groove 0. and an offset a, shaped tointerlock when the ends are brought together, as shown in Fig. 1.

For convenience of description the side of each ring-section which isprovided at the free end with the interlocking or notched face is termedthe interlocking side, while the opposite side is termed the plain side.

As shown in the drawings, the plain sides of the ring-sections abut orare adjacent each Serial lie. 62,646. (No model.)

other at the pivot-point, while in open position (shown in Fig. 2) theconfronting free ends stand in offset relation 't'. e., in differentplanes'-with their interlocking or notched faces remote from each other.In bringing the ring-sections together to interlocked position (shown inFig. 1) it is necessary to posithe sections interlocked. So, also, thisrelation relieves the rivet B from a large part of the torsional strainand prevents the joint from soon wearing loose. To better perform thesefunctions, the flattened pivoted ends are preferably enlarged orexpanded to a greater width than the diameter of the springwire of whichthe sections are formed, giving a broad bearing between the ends capableof readily resisting the torsional strain and permitting the ring to beformed of smaller wire than would otherwise be possible.

Having described our invention, what we claim as'new, and desire. tosecure by Letters Patent, is+

1. A spring-metal ring for temporary binders and the like formed ofsections laterally pivoted together at one end, and each provided on oneside at the free end with an interlocking or notched face located in aplane sides abutting at the pivot-point and said ICO interlocking sidesprovided at the free ends with interlocking or notched faces located inplanes intersecting the axis of the ring, which free confronting ends,in open position, stand in olfset relation with said notched facesremote from each other but, by lateral stress, are brought together withsaid notched faces adjacent and interlocked, whereby said ring-sectionsare positively placed under torsional strain to hold the parts ininterlocked position.

3. A spring-metal ring for temporary binders and the like formed ofsections having flattened ends, overlapped and laterally pivotedtogether,each of said sections having a plain side and an interlockingside, said plain sides abutting at the pivot-point and said interlockingsides provided at the free ends with interlocking or notched faceslocated in planes intersecting the axis of the ring, Which freeconfronting ends, in open position, stand in ofiset relation with saidnotched faces remote from each other but, by lateral stress, are broughttogether with said notched faces adjacent and interlocked,whereby saidring-sections are positively placed under torsional strain to hold theparts in interlocked position,said flattened pivoted ends being expandedor enlarged in the direction of the plane of the ring to resist suchtorsional strain.

In testimonylwhereof We have signed our names to this specification inthe presence of two subscribing witnesses.

HENRY T. ADAMS. OTTO KELLNER.

Witnesses:

GEORGE M. NIcoLL, S. M. WATKINS.

